Third-order harmonics generation in ZnS/CdSe/ZnS cylindrical nanoshells

Abstract

Third-order harmonics generation (THG) has been investigated for ZnS/CdSe/ZnS nanoshell structure. Numerical calculations show that THG susceptibility has two peaks and depends on the parameters such as the size and the kind of structure, the relaxation time and the pump photon energy. The intensity and position of third-order nonlinear susceptibility peaks depend on shell thicknesses; smaller thickness have peak susceptibility at shorter wavelengths.

Theoretical study on third nonlinear optical susceptibility in InxGa1−xN/GaN cylindrical quantum dots

“…Energy states decrease when the QW shell is enlarged, which is the consequence of a reduced energy interval. Our results are comparable to those of Bahari et al [40] done on a ZnS/CdSe/ZnS cylindrical nanoshell.…”

Investigation of Nonlinear Optical Processes in Mercury Sulfide Quantum Dots

“…Numerous studies were reported about the routes to synthesize mercury sulfide (HgS) nanoparticles (NPs) and quantum dots (QDs) [1][2][3][4][5][6][7][8][9][10][11][12][13]. At the same time, the nonlinear optical (NLO) characterization of HgS QDs and NPs has rarely been reported [14][15][16][17]. The interest in these properties is related to the applications of HgS QDs and NPs as optical limiters, mode-lockers, and Q-switchers.…”

“…The third-order nonlinear optical susceptibility induced by the transition between E-1 (inside the well) and E-2 (outside the well) has been calculated for the third harmonic generation (THG) under the effective mass approximation and modified by the local field theory. THG has also been investigated in the ZnS/CdSe/ZnS nanoshell structures [16]. Numerical calculations showed that THG susceptibility has two peaks and depends on parameters such as the size and the kind of structure, the relaxation time, and the pump photon energy.…”